Mathematically derive the 2nd law of motion
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Statement:- The rate of change of momentum of a body is directly proportional to the net force acting on it and it takes place in the direction of net force.
Now, Consider a body of mass 'm' moving with a Velocity 'u'. Let an external force 'F' is acting on it in the same direction of the Velocity. And Let the velocity be changed to 'v' during a time period of '∆t'.
So, the momentum 'mu' changes to 'mv'.
Derivation of Formula:-
The Rate of change of momentum is ∆p/∆t
But, WKT
The Rate of Change of momentum is directly proportional to the force acting on it.
The unit of force is said such that, m = a = f = 1 unit.
So, 1 = k.1.1 → K = 1.
- K is constant of Proportionality, K = 1
Hence, Proved
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